WO2020114946A1

WO2020114946A1 - Longitudinal adjuster for a vehicle seat, and vehicle seat

Info

Publication number: WO2020114946A1
Application number: PCT/EP2019/083257
Authority: WO
Inventors: Erik Sprenger
Original assignee: Adient Engineering and IP GmbH
Priority date: 2018-12-07
Filing date: 2019-12-02
Publication date: 2020-06-11
Also published as: US11479150B2; EP3891014A1; JP7355823B2; CN113165556B; DE102019103476B4; US20220048409A1; CN113165556A; DE102019103476A1; JP2022511482A

Abstract

The invention relates to a longitudinal adjuster (6) for a vehicle seat (1), in particular a motor vehicle seat, comprising at least one pair of rails (10), which has a seat rail (14) that can be connected to the vehicle seat (1) and a floor rail (12) which can be connected to a vehicle floor and on which the seat rail (14) is displaceably guided along the longitudinal direction (x), wherein the longitudinal adjuster (6) has a drive device for adjusting the seat rail (14) relative to the floor rail (12) along the longitudinal direction (x), wherein the drive device has a spindle (20) fixed to the floor rail (12) or to the seat rail (14), a rotatable spindle nut (24) that is mounted on the spindle (20) via a thread engagement, and an electric motor (40) operatively connected to the spindle nut (24) for driving the spindle nut (24), wherein a drive-side output shaft (42) of the electric motor (40) is oriented parallel to the spindle (20), wherein the seat rail (14) for the floor rail (12) has a cut-out (16) and the electric motor (40) is at least partly arranged through the cut-out (16) in a hollow space (18) formed between the seat rail (14) and the floor rail (12). The invention further relates to a vehicle seat (1), in particular a motor vehicle seat, having a longitudinal adjuster (6) according to the invention.

Description

Adient Engineering and IP GmbH, Burscheid

SLOW ADJUSTER FOR A VEHICLE SEAT AND VEHICLE SEAT

The invention relates to a longitudinal adjuster for a vehicle seat, in particular a motor vehicle seat, with at least one pair of rails, one with the

Vehicle seat connectable seat rail and one with a vehicle floor

Connectable bottom rail, on which the seat rail is guided displaceably along a longitudinal direction, the longitudinal adjuster having a drive device for adjusting the seat rail along the longitudinal direction relative to the

Has bottom rail, the drive device having a spindle fixed to the bottom rail or to the seat rail, a rotatable spindle nut mounted on the spindle via a threaded engagement, and one with the spindle nut

has an operatively connected electric motor for driving the spindle nut, an output-side output shaft of the electric motor being oriented parallel to the spindle.

The invention further relates to a vehicle seat.

State of the art

Exemplary longitudinal adjustment devices for vehicle seats are known from DE 10 2017 101 996 A1 and DE 298 14 626 U1. With these one

Drive torque of a common motor is fed to two drive devices via a shaft running transversely to the two pairs of rails. The motor is typically located between the two pairs of rails. The shaft is located in an area below the center of the vehicle seat that runs across the two pairs of rails. The shaft is assigned to the two seat rails, so that the shaft and the motor do not change their positions relative to the seat frame, but rather relative to the floor rails. Such one Longitudinal adjustment device for vehicle seats is also known from US Pat. No. 5,273,242.

Such a construction requires sufficient space under the seat part. This space can be required for future developments of the vehicle seat or the vehicle itself. For example, it may be necessary in future in electrically operated motor vehicles that this installation space is required to accommodate batteries and / or accumulators.

In the prior art, DE 198 60 910 B4 is a drive for one

Longitudinal adjuster of a vehicle seat is known, in which the longitudinal adjuster has two pairs of rails, each with a drive motor, the two

Drive motors are each protruding into an intermediate space between the corresponding pair of rails.

A vehicle seat arrangement is known from DE 10 2016 224 512 A1,

comprising a seat frame and at least one pair of rails, one with the

Seat frame connected to the seat rail and one with a vehicle floor

connecting bottom rail, on which the seat rail is guided displaceably along a longitudinal direction. A drive device serves to adjust the seat rail along the longitudinal direction to the bottom rail and has a spindle, a rotatable spindle nut mounted on the spindle via a thread engagement, a gear unit operatively connected to the spindle nut and an electric motor for driving the spindle nut via the gear unit. It is provided that the spindle is arranged on the seat rail and the spindle nut and the gear unit on the bottom rail. The drive motor is arranged completely below the floor rail and can be received in a recess to be provided in a vehicle floor.

A longitudinal adjuster is known from DE 10 2016 224 514 A1, with a drive motor mounted coaxially on a spindle, which is arranged entirely in a cavity formed between a seat rail and a bottom rail. A longitudinal adjuster is known from DE 100 56 443 A1, the drive motor of which is arranged in alignment with a spindle mounted in a seat rail in an area in front of the seat rail.

task

The invention is based on the object of improving a longitudinal adjuster of the type mentioned, in particular a longitudinal adjuster with an unobstructed space between a first and a second

To enable pair of rails, as well as a corresponding vehicle seat

to provide.

solution

This object is achieved according to the invention by a longitudinal adjuster for a vehicle seat, in particular a motor vehicle seat, with at least one pair of rails which has a seat rail which can be connected to the vehicle seat and one with a

Vehicle floor connectable floor rail, on which the seat rail is guided displaceably along a longitudinal direction, the longitudinal adjuster having a drive device for adjusting the seat rail along the longitudinal direction relative to the floor rail, the drive device having a spindle fixed to the floor rail or to the seat rail, one on the Spindle via a threaded engagement, rotatable spindle nut, and one with the spindle nut

having an operatively connected electric motor for driving the spindle nut, an output-side output shaft of the electric motor being oriented parallel to the spindle, the seat rail or the bottom rail having a recess and the electric motor being at least partially arranged through the recess in a hollow space formed between the seat rail and the bottom rail .

Characterized in that the seat rail or the bottom rail has a recess and the electric motor at least partially in one through the recess Is arranged between the seat rail and the bottom rail cavity, the electric motor can be partially positioned through the recess in the cavity such that the smallest possible height, measured from a lower edge of the bottom rail opposite the electric motor and an upper edge of the electric motor and / or Gearbox or one

Top edge of the seat rail opposite the electric motor and one

Lower edge of the electric motor and / or a gear housing can be achieved.

Advantageous embodiments, which can be used individually or in combination with one another, are the subject of the dependent claims.

The electric motor can be kept at a distance from the spindle in the

Be arranged cavity. The distance can be in the range of 0.1 to 10 mm. The distance is preferably in the range from 0.2 to 5 mm.

An output-side output shaft of the electric motor can be parallel to

Be oriented in the longitudinal direction. A longitudinal extension of the electric motor can be oriented parallel to the longitudinal direction. A longitudinal extension of the electric motor can in particular be oriented parallel to the spindle.

The electric motor can drive the spindle nut by means of a gear. Here, a gearwheel arranged on the output shaft can be in meshing engagement with an external toothing of the spindle nut. Corresponding gear ratios or gear ratios can be implemented by appropriate dimensioning of the gear wheel and the spindle nut.

The electric motor can drive the spindle nut by means of a toothed belt.

Here, a gear wheel arranged on the output shaft can have a

External toothing of the spindle nut can be connected via a toothed belt. An optimal tooth mesh can be achieved by means of a helical toothing, whereby the

Efficiency, the noise behavior and the life of the drive are increased in an advantageous manner. With a corresponding Design of the gear can be used on cheaper materials, which also reduces the production costs.

The spindle can be held on at least one of two of its opposite ends by means of a first spindle holder. The spindle can be held at a first end by means of a first spindle holder. The spindle can be held at a second end by means of a second spindle holder. The first

Spindle holder and the second spindle holder can be designed differently.

The first spindle holder can hold the spindle laterally in a form-fitting manner. The first spindle holder can be designed in such a way that it does not protrude above the spindle in the vertical direction. The first spindle holder can be arranged on the first end of the spindle, viewed from the spindle nut, in the direction of the electric motor. A possible embodiment of the first spindle holder is described, for example, in WO 2016/150 791 A1, the disclosure content of which is expressly included in this regard.

The longitudinal adjuster can have two pairs of rails, each of which is assigned a separate drive device. Each pair of rails thus has its own drive device, so that the rail pairs can be driven by (spatially separate) drive devices. A

Control device can be provided to control the drive devices so that a synchronous adjustment movement can be carried out on the pairs of rails. It is also possible to activate the drive devices by means of the control device, an asynchronous

Make the adjustment movement on the pairs of rails. An asynchronous

Adjustment movement of the pairs of rails can serve, for example, to pivot or rotate a vehicle seat that can be mounted on the longitudinal adjuster. A possible adaptation of the longitudinal adjuster to a rotatable vehicle seat is described, for example, in DE 10 2009 033 494 A1, the disclosure content of which is expressly included in this regard. The underlying object is further achieved according to the invention by a vehicle seat, in particular a motor vehicle seat, with a longitudinal adjuster described above.

Figures and embodiments of the invention

Before further developments of the invention are described below with reference to

Figures are described, it should first be noted that the invention is not limited to the components described. Furthermore, the terminology used is not a restriction, but is only exemplary

Character. To the extent that the singular is used in the description and claims below, the plural is included, unless the context explicitly excludes this.

The invention is explained in more detail below on the basis of advantageous exemplary embodiments illustrated in the figures. However, the invention is not restricted to these exemplary embodiments. Show it:

Fig. 1: schematically a vehicle seat according to the invention with a

Longitudinal adjuster according to a first embodiment,

Fig. 2: a perspective view of a pair of rails

Longitudinal adjuster according to the first embodiment,

3: a rear view of the pair of rails from FIG. 2,

4: a side view of the pair of rails from FIG. 2,

5 shows a longitudinal section of the pair of rails from FIG. 2 along the section line VV shown in FIG. 3, and 6: a longitudinal section of a corresponding to the representation of FIG. 5

Pair of rails of a longitudinal adjuster according to a second

Embodiment.

A vehicle seat 1 shown schematically in FIG. 1 is below under

Use of three spatial directions perpendicular to each other

described. In a vehicle seat 1 installed in the vehicle, a longitudinal direction x runs largely horizontally and preferably parallel to one

Vehicle longitudinal direction, which corresponds to the normal direction of travel of the vehicle. A transverse direction perpendicular to the longitudinal direction x is also oriented horizontally in the vehicle and runs parallel to one

Vehicle transverse direction. A vertical direction z is perpendicular to that

Longitudinal direction x and perpendicular to the transverse direction. With a vehicle seat 1 installed in the vehicle, the vertical direction z runs parallel to the

Vehicle vertical axis.

The position and direction information used, such as front, back, top and bottom refer to a viewing direction one in the

Vehicle seat 1 seated occupant in the normal sitting position, the vehicle seat 1 being installed in the vehicle, in a manner suitable for transporting people

Use position with the backrest 4 upright and, as usual, oriented in the direction of travel. A vehicle seat 1 according to the invention can, however, also be installed in a different orientation, for example transversely to the direction of travel.

The vehicle seat 1 has a seat part 2 and a backrest 4 which is adjustable in inclination relative to the seat part 2 and which can be pivoted forwards in the direction of the seat part 2. The vehicle seat 1 has a longitudinal adjuster 6 for the longitudinally displaceable and longitudinally adjustable attachment of the vehicle seat 1 in the vehicle.

The longitudinal adjuster 6 is used for longitudinal adjustment, i.e. hiring one

Longitudinal position of the vehicle seat 1. For this purpose, the longitudinal adjuster 6 has a pair of rails 10 on each side of the vehicle seat. A pair of rails 10 is on one tunnel side and the other pair of rails 10 arranged on a sill side. The two pairs of rails 10 of the longitudinal adjuster 6 run parallel to one another. Each pair of rails 10 has one with a vehicle floor

connectable bottom rail 12 and by means of the same one with the

Vehicle seat 1 connectable seat rail 14. The seat rail 14 is guided displaceably along the longitudinal direction x relative to the floor rail 12. A longitudinal adjuster 6 according to a first exemplary embodiment is shown here. The vehicle seat 1 can alternatively be mounted on a longitudinal adjuster 6 according to a second exemplary embodiment, as shown in FIG. 6.

Figures 2 to 5 show different representations and views of a pair of rails 10 of the longitudinal adjuster 6 according to a first embodiment and are described below together.

The respective seat rail 14 and the respective bottom rail 12 mutually engage around one another to form a rail profile and are movable relative to one another in the longitudinal direction x, with several rolling elements between the seat rail 14 and the associated bottom rail 12 to reduce the friction, in particular in the form of balls in a ball cage 64, are arranged.

To adjust the longitudinal adjuster 6, a drive device for adjusting the seat rail 14 along the longitudinal direction x relative to the bottom rail 12 is provided. The drive device has a spindle 20 arranged in a hollow space 18 formed between the seat rail 14 and the bottom rail 12 and fixed relative to the bottom rail 12. The spindle 20 is arranged fixed, for which the spindle 20 at its opposite ends 22a, 22b

Spindle holders 26, 28 is held. The spindle holder 26, 28 are fixed to the

Bottom rail 12 and partially also directly connected to the vehicle structure in a form-fitting manner. The rear, first end 22a is held here by means of the first spindle holder 26 and the front, second end 22b is held by means of the second spindle holder 28. The first spindle holder 26 holds the spindle 20 laterally in a form-fitting manner, the first spindle holder 26 not projecting beyond the spindle 20 in the vertical direction z. The first

Spindle holder 26 is in the present case viewed from the spindle nut 24 in FIG Arranged in the direction of the electric motor 40 rear, first end 22a of the spindle 20.

The vehicle seat 1 can be adjusted lengthwise by an electric motor, for this purpose there is an electric motor 40 on at least one of the two pairs of rails 10, preferably one each

Electric motor 40 provided on each of the two pairs of rails 10. Furthermore, the drive device has a rotatable spindle nut 24 which is mounted on the spindle 20 via a thread engagement. The electric motor 40 is for driving the

Spindle nut 24 operatively connected to the same.

The seat rail 14 has a recess 16 for receiving the electric motor 40. The electric motor 40 is at least partially inserted through the recess 16 into the hollow space 18 formed between the seat rail 14 and the bottom rail 12. The electric motor 40 is held in the recess 16 of the seat rail 14 while maintaining a distance a from the spindle 20. The recess 16 is preferably arranged centrally in the seat rail 14 when viewed in the transverse direction y. When viewed in the transverse direction y, the electric motor 40 is preferably arranged centrally above the seat rail 14.

The electronic motor 40 is fixed to the seat rail 14 by means of two motor holders 60. The electric motor 40 has an output shaft 42 on the output side, which is oriented parallel to the longitudinal direction x, in particular parallel to the spindle 20. A

The longitudinal extent of the electric motor 40 is also oriented parallel to the longitudinal direction x, in particular parallel to the spindle 20. The output shaft 42 is preferably arranged in the vertical direction z above the spindle 20. When viewed in the transverse direction y, the output shaft 42 is preferably arranged centrally above the spindle 20. The output shaft 42 extends axially at least into a gear housing 62. The gear housing 62 is present, viewed in the longitudinal direction x, in front of the

Electric motor 40 arranged.

The spindle nut 24 can be driven by the electric motor 40 directly by means of a gear 44 or indirectly by means of a gear 44 in connection with a toothed belt 46. The gear 44 is in the gear housing 62 in Vertical direction z rotatably mounted above the spindle nut 24. The gearwheel 44 is connected in a rotationally fixed manner to the output shaft 42 of the electric motor 40. In the present case, the gear 44 and the spindle nut 24 are not in direct mesh with one another. In the present case, a toothed belt 46 is provided for transmitting the rotational movement of the gear 44 to the spindle nut 24.

According to a modification, not shown, of the invention

Longitudinal adjuster can be made possible by an appropriate dimensioning of the gear 44 and the spindle nut 24, a direct tooth engagement, which also a corresponding gear ratio or

Reduction ratio can be implemented.

The electric motor 40 is positioned as deep as possible in the cavity 18, so that the lowest possible overall height, measured from a lower edge of the bottom rail 12 and an upper edge of the electric motor 40 and / or a gear housing 62, is achieved.

FIG. 6 shows a longitudinal section corresponding to the representation of FIG. 5 of a pair of rails 10 of a longitudinal adjuster 6 according to a second one

Embodiment. The longitudinal adjuster 6 of the second embodiment corresponds to that of the first, unless explicitly described otherwise

Embodiment.

To adjust the longitudinal adjuster 6, a drive device for adjusting the seat rail 14 along the longitudinal direction x relative to the bottom rail 12 is provided. The drive device has a cavity 18 which is arranged in a cavity 18 formed between the seat rail 14 and the bottom rail 12 and is relative to it Seat rail 14 fixed spindle 20. The spindle 20 is arranged in a fixed manner, for which purpose the spindle 20 at its opposite ends 22a, 22b

Spindle holders 26, 28 is held. The spindle holder 26, 28 are fixed to the

Seat rail 14 connected. The rear, first end 22a is in this case by means of the first spindle holder 26 and the front, second end 22b is by means of the second

Spindle holder 28 held. The first spindle holder 26 holds the spindle 20 laterally in a form-fitting manner, the first spindle holder 26 not projecting beyond the spindle 20 in the vertical direction z. The first spindle holder 26 is in the present case on the

Spindle nut 24 viewed from the rear, first end 22a of the spindle 20 located in the direction of the electric motor 40.

The drive device has an electric motor 40 on at least one of the two pairs of rails 10, preferably one electric motor 40 on each of the two

Rail pairs 10, on. Furthermore, the drive device has a rotatable spindle nut 24 which is mounted on the spindle 20 via a thread engagement. The

Electric motor 40 is for driving the spindle nut 24 with the same

connected.

The bottom rail 12 has a recess 16 for partially receiving the electric motor 40. The electric motor 40 is at least partially by the

Recess 16 inserted into the cavity 18 formed between the seat rail 14 and the bottom rail 12. The electric motor 40 is held in the recess 16 of the bottom rail 12 while maintaining a distance a from the spindle 20. The recess 16 is preferably viewed in the transverse direction in the middle in the

Seat rail 14 arranged. When viewed in the transverse direction y, the electric motor 40 is preferably arranged centrally above the seat rail 14.

The features disclosed in the above description, the claims and the drawings can be used both individually and in combination for the

Realization of the invention in its various configurations from

Be meaningful. Although the invention has been described in detail in the drawings and the preceding illustration, the illustrations are to be understood as illustrative and exemplary and not restrictive. In particular, the choice of the proportions of the individual elements shown in the drawing is not to be interpreted as necessary or restrictive. Furthermore, the invention is in particular not limited to the exemplary embodiments explained. Further variants of the invention and its implementation result for the person skilled in the art from the preceding disclosure, the figures and the claims. Terms used in the claims such as “comprise”, “have”, “include”, “contain” and the like do not exclude further elements or steps. The use of the indefinite article does not preclude a majority. A single device can perform the functions of several units or devices mentioned in the claims.

Reference symbol list

1 vehicle seat

2 seat part

4 backrest

6 length adjusters

10 pairs of rails

12 floor rail

14 seat rail

16 recess

18 cavity

20 spindle

22a first end

22b second end

24 spindle nut

26 spindle holder

28 spindle holder

40 electric motor

42 output shaft

44 gear

46 timing belts

60 engine mounts

62 gearbox

64 ball cage

a distance

x longitudinal direction

y cross direction

Vertical direction

Claims

1. Longitudinal adjuster (6) for a vehicle seat (1), in particular a motor vehicle seat, with at least one pair of rails (10) which has a seat rail (14) which can be connected to the vehicle seat (1) and a floor rail (12) which can be connected to a vehicle floor the seat rail (14) is displaceably guided along a longitudinal direction (x), the longitudinal adjuster (6) being one

Drive device for adjusting the seat rail (14) along the

Longitudinal direction (x) relative to the bottom rail (12), the

Drive device comprises a spindle (20) fixed to the bottom rail (12) or to the seat rail (14), a rotatable spindle nut (24) mounted on the spindle (20) via a thread engagement, and an electric motor (40) operatively connected to the spindle nut (24) for driving the spindle nut (24), an output-side output shaft (42) of the electric motor (40) being oriented parallel to the spindle (20),

characterized in that

the seat rail (14) or the bottom rail (12) has a recess (16) and the electric motor (40) through the recess (16) at least partially in one between the seat rail (14) and the

Bottom rail (12) formed flohlraum (18) is arranged.

2. longitudinal adjuster (6) according to claim 1, wherein the electric motor (40) under

Compliance with a distance (a) to the spindle (20) is arranged in the flea space (18).

3. longitudinal adjuster (6) according to claim 2, wherein the distance (a) is in the range of 0.1 to 10 mm.

4. longitudinal adjuster (6) according to claim 3, wherein the distance (a) is in the range of 0.2 to 5 mm.

5. longitudinal adjuster (6) according to one of claims 1 to 4, wherein a longitudinal extent of the electric motor (40) is oriented parallel to the longitudinal direction (x).

6. longitudinal adjuster (6) according to any one of claims 1 to 5, wherein one

Longitudinal extension of the electric motor (40) is oriented parallel to the spindle (20).

7. longitudinal adjuster (6) according to any one of claims 1 to 6, wherein the

Electric motor (20) drives the spindle nut (24) by means of a gear (44).

8. longitudinal adjuster (6) according to claim 7, wherein the gear (44) on the

Output shaft (42) arranged and with an external toothing

Spindle nut (24) is in mesh.

9. longitudinal adjuster (6) according to any one of claims 1 to 6, wherein the

Electric motor (40) drives the spindle nut (24) by means of a toothed belt (46).

10. longitudinal adjuster (6) according to claim 9, wherein a on the output shaft (42) arranged gear (44) is connected to an external toothing of the spindle nut (24) via the toothed belt (36).

11. Longitudinal adjuster (6) according to one of claims 9 or 10, wherein the gear (44) and the external toothing of the spindle nut (24) have helical teeth.

12. Longitudinal adjuster (6) according to one of claims 1 to 11, wherein the spindle (20) is held on at least one of two of its opposite ends (20a, 20b) by means of a first spindle holder (26, 28).

13. longitudinal adjuster (6) according to claim 12, wherein the first spindle holder (26, 28) is designed such that it does not protrude above the spindle (20) in the vertical direction (z).

14. Longitudinal adjuster (6) according to one of claims 12 or 13, wherein the first spindle holder (26) on the, viewed from the spindle nut (24) in the direction of the electric motor (40) located first end (20a) of the spindle (20 ) is arranged.

15. Vehicle seat (1), in particular motor vehicle seat, having a

Longitudinal adjuster (6) according to one of claims 1 to 14.